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who's the better thief to have on-board? I like Jan's quirkiness (the custom crossbow -- huge fan of crossbows!), but dislike his poor carrying capacity. Equipping him with armor will also unfortunately disable his spells.
Yoshimo has a better carrying capacity and A/C-without-penalties, but I find him pretty boring overall.
Then again, I'm not immune to the idea that both have the potential to evolve in interesting ways.
I'm also rocking a gnome fighter/illusionist NPC, plus Jaheira, Aerie, and Korgan. So quite a magic-heavy party as is.